12002749221 has 32 divisors (see below), whose sum is σ = 16799827968. Its totient is φ = 7614552960.

The previous prime is 12002749211. The next prime is 12002749223. The reversal of 12002749221 is 12294720021.

It is not a de Polignac number, because 12002749221 - 2⁷ = 12002749093 is a prime.

It is a super-2 number, since 2×12002749221² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12002749223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1771386 + ... + 1778148.

It is an arithmetic number, because the mean of its divisors is an integer number (524994624).

Almost surely, 2^12002749221 is an apocalyptic number.

It is an amenable number.

12002749221 is a deficient number, since it is larger than the sum of its proper divisors (4797078747).

12002749221 is a wasteful number, since it uses less digits than its factorization.

12002749221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7161.

The product of its (nonzero) digits is 4032, while the sum is 30.

The spelling of 12002749221 in words is "twelve billion, two million, seven hundred forty-nine thousand, two hundred twenty-one".